A) \[CdS,B{{i}_{2}}Si\]
B) \[B{{i}_{2}}{{S}_{3}},PbS\]
C) \[PbS,\text{ }HgS\]
D) \[CDS,\text{ }A{{g}_{2}}{{S}_{3}}\]
Correct Answer: D
Solution :
\[CdS\]and\[A{{g}_{2}}S\]can be separated by yellow ammonium sulphide. II A group and II B group radicals are distinguished by this reagents.
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